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A kind of busbar for high-safety power battery module and its manufacturing method

A power battery and busbar technology, which is applied to battery components, secondary batteries, circuits, etc., can solve the problems of unable to cut off the circuit in time, thermal runaway of modules, and no safety protection, so as to avoid thermal runaway and over-control Accurate stream size and improved security

Active Publication Date: 2022-07-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production process of power battery modules, the busbars used in series and parallel connection between batteries are copper or aluminum bars. The copper or aluminum bars themselves have no safety protection. When an external short circuit occurs, the circuit cannot be cut off in time, causing the module to fail Thermal runaway, burning the module, may eventually cause a safety accident

Method used

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  • A kind of busbar for high-safety power battery module and its manufacturing method
  • A kind of busbar for high-safety power battery module and its manufacturing method
  • A kind of busbar for high-safety power battery module and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a method for preparing a bus bar. like figure 1 As shown, the bus bar includes a substrate 1 , a semiconductor layer 2 of a PTC thermistor, a metal layer 3 and a lead terminal 4 . The preparation of the busbar includes:

[0047]Base material production: According to the ratio of PE: SP = 95%: 5%, smelting and mixing molding is carried out to make a thickness of 200 μm and a conductivity of 10 -8 s / m of substrate.

[0048] Production of PTC coating material: According to the weight ratio of PE: yttrium oxide: barium titanate = 74%: 2%: 24%, smelting and mixing are carried out to prepare a uniform coating material.

[0049] PTC coating: the above-mentioned substrate is subjected to corona treatment, and then the prepared PTC coating material is applied to the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, and the semiconductor layer of the PTC thermistor is formed. The thickness is 100 μm.

[0050] ...

Embodiment 2

[0054] This embodiment provides a method for preparing a bus bar. like figure 1 As shown, the bus bar includes a substrate 1 , a semiconductor coating 2 of a PTC thermistor, a metal layer 3 and a lead-out terminal 4 . The preparation of the busbar includes:

[0055] Base material production: According to the ratio of PE: SP = 97.5%: 2.5%, mixed molding is carried out to make a thickness of 300 μm and a conductivity of 10 -9 s / m of substrate.

[0056] Production of PTC coating material: According to the ratio of PE: yttrium oxide: barium titanate = 74%: 2%: 24%, smelting and mixing are carried out to make a uniform coating material.

[0057] PTC coating: the above-mentioned substrate is subjected to corona treatment, and then the prepared PTC coating material is applied to the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, and the semiconductor layer of the PTC thermistor is formed. The thickness is 200 μm.

[0058] Metal plating...

Embodiment 3

[0062] This embodiment provides a method for preparing a bus bar. like figure 1 As shown, the bus bar includes a substrate 1 , a semiconductor coating 2 of a PTC thermistor, a metal layer 3 and a lead-out terminal 4 . The preparation of the busbar includes:

[0063] Base material production: According to the ratio of PP: SP = 95%: 5%, mixed molding is carried out to make a thickness of 200 μm and a conductivity of 10 -8 s / m of substrate.

[0064] Production of PTC coating material: According to the ratio of PE: yttrium oxide: barium titanate = 80%: 3%: 17%, smelt and mix to make a uniform coating material.

[0065] PTC coating: the above-mentioned substrate is subjected to corona treatment, and then the prepared PTC coating material is applied to the substrate by electrostatic spraying to form the semiconductor layer of the PTC thermistor, and the semiconductor layer of the PTC thermistor is formed. thickness

[0066] Metal plating layer: Magnetron sputtering is used to c...

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Abstract

The invention provides a high-safety power battery module bus bar and a manufacturing method thereof. Wherein, the bus bar includes a plate-shaped base material and at least one coating unit covering the surface of the base material, and each coating unit is a multi-layer structure, including at least one semiconductor layer of a PTC thermistor and at least one metal layer, The metal layer is alternately arranged with a full plating area and a pattern plating area along the current path. The pattern plating area includes a plurality of metal sheet micro-units, and contacts are passed between the metal sheet micro-units and between the metal sheet micro-units and the full plating area. on. When an external short circuit passes through a large current, the contacts of the pattern plating area will be fused, the micro-units will be independent, and the conductive path will be disconnected; at the same time, the thermal internal resistance of the semiconductor layer of the PTC thermistor will increase, which further has the effect of breaking the circuit. It has the effect of double protection. The bus bar provided by the present invention can greatly improve the safety performance of the battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery manufacturing, in particular to a busbar for a high-safety power battery module and a manufacturing method thereof. Background technique [0002] Lithium-ion battery is a new type of green and environmentally friendly chemical power source that appeared in the early 1990s. It has the advantages of high voltage (single battery voltage up to 3.6V, high specific energy (100-130Wh / Kg), stable discharge voltage, good cycle performance, excellent safety performance and long storage and working life, etc. It is the latest technology in the chemical power supply industry. one of the development directions. [0003] In the production process of the power battery module, the bus bars used in series and parallel between the batteries are copper or aluminum bars. The copper or aluminum bars themselves have no safety protection. Thermal runaway, burning out the module, and possibly causing a safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/505H01M50/516H01M50/517H01M50/526H01M50/524H01M50/581H01M50/583H01M10/0525
CPCH01M10/0525Y02E60/10
Inventor 李缜吴洋洋王启岁汪涛张沿江娄帅帅
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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